Valve-grinder



W. H. EMMERT AND E. 'MINGE:

VALVE GRINDER. APPLICATION FIL EDYSEPT. I9. 1918;

Patented Mar. 29, 1921.

2 SHEETSSHEET I.

AIM

W. H. EMMERT AND E. MINGE."

VALVE GRINDER.

APPLICATION F|LED'SEPT.19| 191s.

Patented Mar. 29, 1921.

2 SHEETS-SHEET 2. &

A UNITED STATES PATENT OFFICE.

WILLIAM H. EMMERT AND EINAR MINGE, OF CHICAGO, ILLINOIS.

VALVE-GRINDER.

Specification of Letters Patent. Patented Mar. 29, 1921.

Application filed September 19, 1918. Serial No. 254,733.

To all whom it may come ml" Be it known that we, WVILLIAM H. EM- MEET, a citizen of theUnited States, and EINAR Mince, a subject of the King of N01 way, residents of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Valve-Grinders; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification. I r

This invention relates to an improved form of a valve grinder adapted to grind the valve of an internal combustion engine by reciprocating the valve on its seat in such a manner that the formation of grooves or pits on either the valve or its valveseat by the abrasive material used in the grinding process is prevented, thereby insuring a proper grinding of the valve.

It is an object ofthis invention to construot a valve grinder wherein a slotted sleeve is adaptedito be moved on a stem to cause a reciprocating movement thereof.

Another object of the invention is the construction of a valve grinder having a tool stem provided with means for engaging in a slotted sleeve to'cause said stem to recip rocate as the sleeve is; lowered and raised.

It is an important object of the invention to provide a tool wherein a knob and a slotted sleeve are movably engaged on a tool stem to cause a reciprocating motion to be imparted to said stem when said knob is held stationary and said sleeve is alternately lowered and raised on said stem.

this invention will be apparent from the disclosures in the specification and drawings. The invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described. .On the drawings:

Figurel is a front elevation of a valve grinder embracing the principles of this invention and shown engaged with an engine Fig. 4. is an enlarged detail section taken on line 4-4, of Fig. 2.

Fig. 5 is a side elevation of the tool tip removed from the device.

F1g. 6 is an enlarged fragmentary sectional view taken through the lower end of the yalve grinder stem.

F g. 7 is a fragmentary central vertical section taken through a modified form of the device.

Fig. 8 is an enlarged section taken on line 8- 8, of Fig. 7, showing parts in elevation.

Fig. 9 is a fragmentary central vertical section taken through another modified form of the device and showing the grooved inner sleeve in elevation.

Fig. 10 is an enlarged detail section taken on line 10-10, of Fig. 9, with parts in elevation.

Fig. 11 is a fragmentary central vertical section taken through still another modified form of valve grinder and showing the inner mechanisms in elevation.

Fig. 12 is a similar sectional view thereof turned through an angle of ninety degrees.

Fig. 13 is an enlarged section taken on line 13-13, of Fig. 11.

Fig. 14 is an enlarged section taken on line 1e44, of Fig. 11.

Fig. 15 is a fragmentary plan view of the inner grooved cylinder shown in Figs. 11 and 12. i

As shown on the drawings:

The reference numeral 1, indicates a valve casing provided with a valve seat 2, and having a notched valve 3, seated thereon. The valve grinder embodying the principles of this invention embraces a shank, shaft or stem 4, having a. hand grip, knob or wheel Other and further. important objects of a 5, swiveled on the upper end thereof by means of a ball bearing mechanism 6, to permit independent movement of the shaft 4, when the wheel 5, is held stationary and utilized to apply pressure upon the shaft dura collar or look sleeve 12. If preferred the tool tip may be integrally formed on the lower end of the shaft 4. Engaged on the shaft 4, at about the middle portion thereof is a passaged collar or holder 13, which is rigidly locked in position against movement on said shaft by a'set screw 14,01 any other suitable means. Integrally formed at right angles to one slde of the holder 13, and

therefore at right angles to said shaft 4, is

a post or pin 15. I

Slidably engaged on the shaft 4, is an op erating element comprising an externally knurled cylindrical grip, handle or sleeve 16, the upper end of which is closed by an integral centrally apertured head 17, to permit the shaft 4 to project therethrough. Re-

movably threaded or secured upon the lower open end of the sleeve 16, to close the same is a centrally apertured closure cap 18 through which the, shaft 4, also projects.

Formed in the inner side wall of the cylindrical sleeve 16, is a spiral groove 19, into which the outer end of the pin 15,'projects to cause-a reciprocating motion of the shaft and the tool tip when theidevice is operated. The spiral groove 19, starts at one side of the upper end of the sleeve 16, and spirals downwardly one half revolution and terminates at the opposite side and lower end of said sleeve, as clearly shown in Fig. 2.

Figs. 7 and 8, d1sclosea modified form of i the device wherein a stem, shank or shaft 20, 'hasrigidly secured at right angles to oneside thereof a post or pin 21, which may beintegrally formed on said shaft or 1 secured in'position thereon by means :of a

'set screw 22. The upper end of the shaft 20, is "provided with a swivel knob or wheel, while the lower end of said shaft20, may

, be equipped with'a removable or an integral screw driver tool tip, as preferred, and similar to the construction shown in Fig. 2.

Slidably engaged on the shaft 20, is an operating element embracing a cylindrical outer grip, handle or sleeve 23, having the upper open end thereof closed by means of a centrally apertured top cap 24, while the lower end of said sleeve 23, is'closed by means of a centrally apertured lower cap 25. As shown the shaft 20, projects axially through the caps 24 and 25. Rigidly secured within the sleeve 23,v is an inner sleeve or cylindrical tube 26, provided with a spiral groove 27, into which the outer end of the pin 21, projects to cause a-reciprocating moform of valve grindercomprising a shank,

stem or shaft 28, having integrally formed or rigidly secured at right angles thereon by means of a set screw 29, two alined oppositelv directed pins or posts 30 and 31. Slidably engaged on the shaft 28, is an operating element embracing an outer cylindrical grip, handle or sleeve 32, having the upper open end thereof closed by means of a centrally apertured top cap 33, while the lower end is closed by a centrally apertured lower cap 34.

- rue shaft 28, projects axially through the sleeve 32, and the caps 33 and 34, secured thereon. Rigidly secured within the outer sleeve 32, is an inner sleeve or cylindrical tube 35, provided with spiral half revolution grooves 36 and 37 into which the outer ends of the pins 30 and 31, respectively project to cause a reciprocating motion of the shaft 28, when the device is operated. The upper ends of the grooves 36 and 37, start at opposite sides of the upper portion of the inner sleeve 35, and spiral downwardly a half revolution to the opposite sides of the lower portion of said inner sleeve.

In the modified form of the device shown in Figs. 11 to 15, inclusive, the reference numeral 38, designates a valve grinder shank, stem or shaft, having integrally formed or rigidly secured at right angles thereto by, means of a set screw 39, a post or pin 40. Slidably engaged on said shaft 38, is an operating element comprising an outer cylindrical grip, handle or sleeve 41, having the ends thereof closed by centrally apertured upperand lower caps 42 and 43, respectively, through which the shaft 38, axially projects. Rigidly secured within the outer sleeve 41, is an inner sleeve or cylindrical tube 44, provided with a circumferential wavy groove 45, provided with irregularities 46, in each of the waves thereof, as clearly shown in Fig. 15, to afford a means of imparting an irregular reciprocating motion to the valve grinder tool formed or secured on the lower end of the shaft 38, when the device is operated.

The operation is as follows:

To use the device for grinding a valve the tool end 11, of the shaft 4, is engaged in a slot provided for the purpose in the valve 3. One hand of an operator is engaged to hold the wheel 5, stationary while the other hand of the operator grips the sleeve 16, and alternately moves the same downwardly and upwardly with respect to the shaft 4, thereby causing said shaft and its tool 11, to reciprocate. Reciprocation of the tool 11, causes the valve 3, to reciprocate on its seat,

. and said valve is accordingly alternately rotated a half revolution in opposite directions by the reciprocation of said sleeve upon the shaft to properly grind the valve. It has been found that a pressure of about two pounds upon the wheel 5, is suflicient for the proper operation of the device. The reciprocating motion imparted to the valve 3, when the sleeve 16, is operated is of course caused by the movement of the pin 15, in the spiral groove 19. By the reciprocating movement of the valve on its seat the formation of grooves or pits on either the valve or its seat by the abrasive material used in the grinding process is prevented, thereby insuring a proper grinding of the valve parts.

The operation of the modified forms of the devices shown in Figs. 7 to 10, inclusive, is similar to that above described.

In the modified form of valve grinder shown in Figs. 11 to 15, inclusive, the device is held in position as already described, and the sleeve 41, is reciprocated and simultaneously rotated on the shaft 38, to cause the pin 40, to follow the circumferential wavy groove 45. The irregularities 46, of the groove 45, in combination with the waves thereof, act to produce an irregular or vibratory motion as the shaft is given successive oscillations while it is being turned through a complete revolution.

If preferred the sleeve 41, need not be rotated as it is reciprocated on the shaft 38. In such a case the pin 40, may be alternately moved downwardly and upwardly in one portion of the groove 45 only, thereby imparting an irregular or vibratory reciprocating quarter turn motion to the shaft 38.

We are aware that numerous details of construction may be varied through a Wide range without departing from the principles of this invention, and We therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

We claim as our invention:

1. A valve grinder comprising a shaft, a sleeve of much greater internal diameter than the shaft slidable thereon, a single halftwist internal groove in the sleeve, centrally apertured top and bottom members secured to the sleeve for guiding the latter in its sliding movement, and means on the shaft adapted to engage in the groove in said sleeve whereby the shaft is given partial backward and forward turns when the sleeve is reciprocated thereon.

2. A valve grinder comprising a shaft, a sleeve slidably mounted on said shaft having an endless zig-zag groove on its inner face, means on the shaft adapted to engage in the groove in said sleeve, said groove being formed so that the shaft turns in the same direction on both forward and return movements of the sleeve on the shaft.

In testimony whereof we have hereunto subscribed our names in the presence of two subscribing witnesses.

WILLIAM H. EMMERT. EINAR MINGE. Witnesses: EARL M. IIARDINE,

Crmms W. HILLS, Jr. 

